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发布时间:2023-10-26 00:18:11

[单项选择]

Scientists have developed a slimming (减肥) drug that successfully suppresses appetite and results in a dramatic loss of weight without any apparent ill effects.
The drug interferes with appetite control and prevents the build-up of fatty tissue. Laboratory mice given the drug lost up to a third of their total body weight.
Within 20 minutes of being given the drug, called C75, the mice lost interest in eating and survived apparently content on just 10 percent of the food they would normally eat.
As a result, mice taking the drug lost 45 percent more weight than mice fed the same amount of food, which compensate for the lack of food by becoming more lazy.
Scientists, from the Johns Hopkins University in Baltimore, said that C75 is likely to produce a similar effect on humans because appetite control in brain is thought to be based on the, same chemical pathways as those in mice.
"We are not claiming to have found a fabled(神奇的) weight-loss
A. controls appetite and causes obvious weight loss.
B. reduces weight with some ill-effect
C. interferes with appetite and builds up fatty tissue
D. is still going through laboratory tests

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[单项选择]

Scientists have developed a slimming (减肥) drug that successfully suppresses appetite and results in a dramatic loss of weight without any apparent ill effects.
The drug interferes with appetite control and prevents the build-up of fatty tissue. Laboratory mice given the drug lost up to a third of their total body weight.
Within 20 minutes of being given the drug, called C75, the mice lost interest in eating and survived apparently content on just 10 percent of the food they would normally eat.
As a result, mice taking the drug lost 45 percent more weight than mice fed the same amount of food, which compensate for the lack of food by becoming more lazy.
Scientists, from the Johns Hopkins University in Baltimore, said that C75 is likely to produce a similar effect on humans because appetite control in brain is thought to be based on the, same chemical pathways as those in mice.
"We are not claiming to have found a fabled(神奇的) weight-loss
A. it helps mice sleep well
B. it keeps fatty tissue from growing
C. it controls eating
D. it prevents overeating

[填空题]

Scientists have developed a new cancer drug. So far, they have tested it only on{{U}} (36) {{/U}}animals. The drug is designed to{{U}} (37) {{/U}}and kill cancer cells but not healthy cells.
First, the drug enters the cancer and destroys the supply of blood. Then it releases{{U}} (38) {{/U}}to destroy the cancer cells.
Researchers at the Massachusetts Institute of Technology in Cambridge carried out the study. The{{U}} (39) {{/U}}appeared in Nature{{U}} (40) {{/U}}. A school news release called the drug an "anti-cancer smart bomb."
Ram Sasisekharan is a professor at M.I.T. He says his team had to{{U}} (41) {{/U}}three problems. They had to find a way to destroy the blood vessels, then to{{U}} (42) {{/U}}the growth of new ones. But they also needed the blood vessels to supply chemicals to destroy the cancer.
So, the researchers designed a two-part "nanocell". The cell is{{U}} (43) {{/U}}in nanometers, or

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